scott



(No Model.)

W. G. SCOTT. RAILROAD SIGNAIING APPARATUS.

Patented July 10, 1894.

Prrzns co., puurmumo.. wAsNINaToN. u. c.

` Nrrnn STATES nIPATinvT OFFICE.

fwrLLiAM ascorr, er1-LIVERPOOL, nvGLAND.Y

RAILROAD SIGNALING APPARATUS.

sPncIrIcATroN. forming part of Lettersratent No. 522,676, dated July 1o, 18941. Application iiled lTnne 18, 1892 Serial No. 437,215. (No model.) Patented in England November 11, 1891, No. 19,575. f

To a/ZZ whom it may concern; y

Be it known that LWILLIAMVGEORGE Scorr, engineer, a subj ect of the Queen of Great Britain, residing at Liverpool, in the county of Lancaster, inthe Kingdom of England, have invented certain new and useful Improvevments in Railroad Signaling Apparatus, (for which I have received-Letters Patent in England, dated November 11, 1891, No. 19,575,) of vwhich the following is a specification.

My invention of improvements in lock signaling consists of additions to the interlocking of levers working points and signals ordinarily in .use on railways. These additions to the interlocking, which I have named automatic check locking, are Afor the purpose of preventing a signalman forgetting that he has shunted a train from one main line to another (as wasthe case, and which caused the accident, at Norton Fitzwarren near Taunton on the 11th of November, 1890) or from a goods line or siding to a main line. My invention attains something more than this; for, providing that, after a trainhas arrived inside a home signal, a cross-over-road from the main line upon which the train is standing to another main line, or to a goods line or siding be used, `the train will be protected by the tlxed signals until it is allowed to depart into the section in advance, or until it has been shunted clear of the main lines.

That my invention may be understood, I

` proceedto describe the drawings hereunto annexed, such description enabling any one to carry outthe same -principle in all cases differing from that illustrated, such as at junctions, places where there are more than two main lines, or where there are goods lines or sidings, or both.

Figure l is a diagram of an ordinary' block` signaling station where there is a cross-overroad from one main line to the other. Fig. 2 is a plan view of thetappets and the locking case with the cover removed. A Fig. 3 is a crosssection taken on the line wx in Fig. 2. Figs. 4 and 5 are longitudinal sections taken respectivelyonthe lines A A and B B in Fig. 2.

The figures on the diagram are the numbers of the levers in the signal cabin working the points and signals as follows: lever No. 4, down distant signal; lever No.2, down hone signal; lever No. 3, down starting sig:

pets 4: and 9 are tapered only.

lpoints; lever N o. 7, facing-point-lock on No.

6 points; lever No.8, spare; lever N o. 9, down to up line signal; lever No. 10, up starting signal; lever No. ll, up home signal; lever No. 12, up distant signal.

My invention only aects levers 2, 3, 4, 6, 6o 9, 10 and l1, and it must be understood that the usual interlocking between theselevers, namely, 2 and, 1,1 interlocking with 6, 3 and 10 locking and back locking 6, 6 preceding 4 and 9, and 4 and 9 interlocking, is to be car- 65 ried out by any of the ordinary systems at present in use.

Fig. 2 is a plan, and Fig. 3 a section, of a locking case (the plan shown with the cover removed) for locking gear of the type well 7o yknown as tappet7 locking, and the parts numbered according to the levers to which they are attached 2, 3, 4c, 6, 9, 10 and 11 are tappets; 2, 6 and 11 being similar to tappets ordinarily in use, but having pieces aa a2 on 75 their under sides, b beingan elevation of these pieces. Tappets 3 and 1,0 are tapered and have pieces c, c on their under sides; d being an elevation of these pieces; and tap# e and e' are 8o locks known as T-locks and are similarto those ordinarily in use, exceptingthat the nose part is thinner than the body of the lock as lshown in the section, Fig. 5.

The object of the linclined blocks a a and 8 5 a2, fixed to the tappets, is to provide a raising device for these tappets; when the tappets 2, 6 or 11 have been sufficiently moved, their respective inclined blocks will come to rest on the frame, so that the tappets will then be able 9o to rise on the blocks and allow the respective locks abutting on the tappets toslide under such tappets. Further, the object of the blocks cand of on tappets?? and 10 is, when the levers of these tappets havebeen sufticiently drawn over, to engage the sloping faces of the blocks't" lo and push these blocks (4," k) back again.

The T-locks tit into notches out in the sides of tappet 6A and some thin, for purposes hereinafter described; f and f are thick, yand f2 and f3 indilferently thick or thin square locks com nected togetherbya thin under strip of metal Some of the other locks are thick roo f in the ordinary Way; and g2 g3 are thick, and g and g indiflerently thick or thin square locks connected together by a thin overstrip of metal in the ordinary way. In the drawings, the tappets are shown in the normal position,with the levers back in the frame, and it is evident that, when the crossover-road lever 6 is pulled over, the tappet of the same number will cause the T-locks c and e to spread, and these, in their turn,will torce the locks ],f, f2 and]e3 to the left,and the locks g, g', g2 and g3 to the right. This will lock levers 2 and ll working the home signals, and these can only be released, first, by lthe pulling over of lever 8 or 9 which will draw the lock f out of the notch in tappet 2: and second, by the pulling over of lever Ll orlO which will draw the lock gs out of the notch in tappet l1,it being possible to do this while the crossover-road lever 6 is still over, as the piece a on the under side of tappet 6 has, at the end oi the stroke ot that tappet, caused it to be lifted sufficiently to allow the thin part ot the T-locks e and e to slide under the tappet, the thicker part of the locks preventing their being pushed so far, that they will not re-engage with tappet 6 when lever 6, to which the tappet is attached, is put back into its normal position.

Taking a case in illustration-supposing a train to have arrived inside the home signal 2, which signal has afterward been put to danger, and the train shunted from the down to the up line, the signal 9 having been used for this purpose; the signalman would now be free to use signal 2 again, but not signal Il until signal 4t had been used to signal the train back to the down line, or vsignal 10 to allow it to depart on the up line.

Providing that a signalman is in the habit, after receiving and giving the telegraphic signals for a train, of lowering the homo signal before the starting signal, the above described automatic check locking fulfills what is required of it, but I iind, from observation, that many signalmen are inthe habit of lowering the starting signal first, and, to compel the signalman to acquire the habit of lowering the houle signal before the starting signal, and, to make him lower the home signal first, excepting when a crossover-road between the main lines, or between the main line and a goods line or a siding, has been used, Ishorten the tappets 3 and l0, as shown, and rivet pieces It h', which I call fast-locks, on to the locking caso at the end of the tappets, or I cut square notches in the tappets 3 and l0 and rivet pieces on to the locking case, as shown in dotted lines, so as to pre- 6o vent tappets 3 and lO being moved by the levers to which they are attached until they (the tappets) have been lifted above these fast-locks. (In case the square notches are cut in tappets 3 and 10, and the pieces for the fast-locks riveted on to the locking case, as shown in dotted lines, locks f and g2 would have to lie partly by the side of, and partly on, the pieces riveted to the locking case.) To lift tappet 3, I employ the locks t', t" and `t2, these being connected together by an under strip of metal in the ordinary way; lock t is a thin lock, lock t2 indittercntly a thick or thin lock, and lock t" a wedge-shaped lock, as shown in the section, Fig. It. To lift tappet l0, I employ the locks 7c, 7c', and 7a2, k2 being a thin lock, 7o inditferently a thick or thin lock, and c a Wedge-shaped lock as t" in Fig. 4f reversed. Supposing lever 2 or 6 to be worked, the locks t' z" and 'i2 are drawn or lforced to the left, the wedge-shaped lock t" raising the tappet 3 over its fast lock. When lever 3 is Worked, the piece c on the under side of tappet 3 will come in contact with the lock i and force the locks t', t and 2 back into their original positions, the thin lock 1l passing under tappet 2 if that tappet is pulled over and lifted by the piece ct on its under side, or the thin part of the T-lock e will pass under tappet 6 if that tappet is pulled over and lifted by the piece a on its under side. In like manner, tappet 10 will be released by the working of tappet 6 or ll, and the locks 7c, 7e and 7a2.

I declare that what I claim is- The combination, with a locking case, of the tappets 2, 3, 4, G, 9, 10 and 1l sliding therein, the tappets 2, 6 and 1l being notched y and provided respectively with the blocks ct, a and a2, and the tappets 3 and 10 being provided with the blocks c and c; the locks t', t" and i2 connected together and pertaining respectively to the tappets 2, 3 and 6; the locks 7c, 7c and 7a2 connected together and pertaining respectively to the tappets 6, l0 and 1l; the locks j', f f2 and f3 connected together and pertaining respectively to the tap` pets 2, 3, G and t); the locks g, g', g2 and g3 connected together and pertaining respectively to the tappets Il, G, 10 and ll; and the T-locks e and e having their nose parts engaging with the notches in tappet 6, and operating the locks i2, f2, and 7o, g', substantially as and for the purposes set forth.

In testimony whereof I have signed my naine to this specification in the presence of two subscribing witnesses.

W. G. SCOTT.

Witnesses:

WM. B. THOMPSON, 1I. R. SHOOBRIDGE.

IOO 

